mining in home with 10-20 gpus is not profitable now ?
It depends on your country of residence and on the cost of electricity.
For example, in many regions of Russia, $ 20 a day or $ 600 a month is a very high salary.
And the cost of electricity is $ 0.015-0.035 per kilowatt.
And if you live in America or Europe, then I'm not sure that home mining will be profitable, as a maximum - a hobby.